#include"practice.h"
namespace yue
{
	void text1()
	{
		string s1=("yuejianhua");
		s1.push_back('k');
		s1.insert(3,"HJK");
		cout << s1 << endl;
		s1.erase(3,3);
		cout << s1 << endl;
	}
}
int main()
{
	yue::text1();
	return 0;
}
